Signal processing strategy for ALADIN

Juergen Streicher

doi:10.1117/12.228512

15 December 1995 Signal processing strategy for ALADIN

Juergen Streicher

Proceedings Volume 2581, Lidar Techniques for Remote Sensing II; (1995) https://doi.org/10.1117/12.228512
Event: Satellite Remote Sensing II, 1995, Paris, France

Abstract

The atmospheric laser Doppler instrument ALADIN will provide information about the wind velocity using the motion of small particles and the resulting Doppler shift between the transmitted and received laser frequency. The accuracy of the frequency estimation depends mainly on the signal-to-noise ratio (SNR) of the received signal. An improvement of the signal quality i.e. SNR can be done by reducing the bandwidth and by averaging over some shots. The bandwidth reduction can be performed either analogue or digital. The analogue technique includes a lot of risks and error sources, the digital demodulation and filtering shows only one critical component, the analogue to digital converter. The shot averaging can also be performed by two different techniques: coherent or incoherent accumulation. Both, the bandwidth reduction as well as the averaging techniques are presented.

Citation Download Citation

Juergen Streicher "Signal processing strategy for ALADIN", Proc. SPIE 2581, Lidar Techniques for Remote Sensing II, (15 December 1995); https://doi.org/10.1117/12.228512

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